Don't know your age but I was 63 when I first went for elk in Idaho, had to keep up with a 30 & 28 year old, my friends sons as he couldn't make it. To my surprise, I didn't have too much trouble keeping up. As stated above, your boots are very important and, make sure they're nicely broken in. Get a good light weight water filter, beats having too lug it with you. if you don't know how to use a compass, get a gps, getting lost sucks !
Good knife that you can baton wood with + 3 forms of fire making. Some kind of silnylon that you can make a shelter out of, it is light weight and pretty resilient. Light weight camp cooking stove that can burn wood or the small fire cubes, small first aid kit, the list can go on but try to think light weight gear.
Good luck, your going to have a blast !